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<FONT color="green">001</FONT>    /* ========================================================================<a name="line.1"></a>
<FONT color="green">002</FONT>     * JCommon : a free general purpose class library for the Java(tm) platform<a name="line.2"></a>
<FONT color="green">003</FONT>     * ========================================================================<a name="line.3"></a>
<FONT color="green">004</FONT>     *<a name="line.4"></a>
<FONT color="green">005</FONT>     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.<a name="line.5"></a>
<FONT color="green">006</FONT>     *<a name="line.6"></a>
<FONT color="green">007</FONT>     * Project Info:  http://www.jfree.org/jcommon/index.html<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     * This library is free software; you can redistribute it and/or modify it<a name="line.9"></a>
<FONT color="green">010</FONT>     * under the terms of the GNU Lesser General Public License as published by<a name="line.10"></a>
<FONT color="green">011</FONT>     * the Free Software Foundation; either version 2.1 of the License, or<a name="line.11"></a>
<FONT color="green">012</FONT>     * (at your option) any later version.<a name="line.12"></a>
<FONT color="green">013</FONT>     *<a name="line.13"></a>
<FONT color="green">014</FONT>     * This library is distributed in the hope that it will be useful, but<a name="line.14"></a>
<FONT color="green">015</FONT>     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY<a name="line.15"></a>
<FONT color="green">016</FONT>     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public<a name="line.16"></a>
<FONT color="green">017</FONT>     * License for more details.<a name="line.17"></a>
<FONT color="green">018</FONT>     *<a name="line.18"></a>
<FONT color="green">019</FONT>     * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a>
<FONT color="green">020</FONT>     * License along with this library; if not, write to the Free Software<a name="line.20"></a>
<FONT color="green">021</FONT>     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,<a name="line.21"></a>
<FONT color="green">022</FONT>     * USA.<a name="line.22"></a>
<FONT color="green">023</FONT>     *<a name="line.23"></a>
<FONT color="green">024</FONT>     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.<a name="line.24"></a>
<FONT color="green">025</FONT>     * in the United States and other countries.]<a name="line.25"></a>
<FONT color="green">026</FONT>     *<a name="line.26"></a>
<FONT color="green">027</FONT>     * -------------------------<a name="line.27"></a>
<FONT color="green">028</FONT>     * WaitingImageObserver.java<a name="line.28"></a>
<FONT color="green">029</FONT>     * -------------------------<a name="line.29"></a>
<FONT color="green">030</FONT>     * (C)opyright 2000-2004, by Thomas Morgner and Contributors.<a name="line.30"></a>
<FONT color="green">031</FONT>     *<a name="line.31"></a>
<FONT color="green">032</FONT>     * Original Author:  Thomas Morgner<a name="line.32"></a>
<FONT color="green">033</FONT>     * Contributor(s):   Stefan Prange;<a name="line.33"></a>
<FONT color="green">034</FONT>     *<a name="line.34"></a>
<FONT color="green">035</FONT>     * $Id: WaitingImageObserver.java,v 1.8 2008/09/10 09:24:41 mungady Exp $<a name="line.35"></a>
<FONT color="green">036</FONT>     *<a name="line.36"></a>
<FONT color="green">037</FONT>     * Changes (from 8-Feb-2002)<a name="line.37"></a>
<FONT color="green">038</FONT>     * -------------------------<a name="line.38"></a>
<FONT color="green">039</FONT>     * 15-Apr-2002 : first version used by ImageElement.<a name="line.39"></a>
<FONT color="green">040</FONT>     * 16-May-2002 : Line delimiters adjusted<a name="line.40"></a>
<FONT color="green">041</FONT>     * 04-Jun-2002 : Documentation and added a NullPointerCheck for the constructor.<a name="line.41"></a>
<FONT color="green">042</FONT>     * 14-Jul-2002 : BugFixed: WaitingImageObserver dead-locked (bugfix by Stefan<a name="line.42"></a>
<FONT color="green">043</FONT>     *               Prange)<a name="line.43"></a>
<FONT color="green">044</FONT>     * 18-Mar-2003 : Updated header and made minor Javadoc changes (DG);<a name="line.44"></a>
<FONT color="green">045</FONT>     * 21-Sep-2003 : Moved from JFreeReport.<a name="line.45"></a>
<FONT color="green">046</FONT>     */<a name="line.46"></a>
<FONT color="green">047</FONT>    <a name="line.47"></a>
<FONT color="green">048</FONT>    package org.jfree.util;<a name="line.48"></a>
<FONT color="green">049</FONT>    <a name="line.49"></a>
<FONT color="green">050</FONT>    import java.awt.Graphics;<a name="line.50"></a>
<FONT color="green">051</FONT>    import java.awt.Image;<a name="line.51"></a>
<FONT color="green">052</FONT>    import java.awt.image.BufferedImage;<a name="line.52"></a>
<FONT color="green">053</FONT>    import java.awt.image.ImageObserver;<a name="line.53"></a>
<FONT color="green">054</FONT>    import java.io.Serializable;<a name="line.54"></a>
<FONT color="green">055</FONT>    <a name="line.55"></a>
<FONT color="green">056</FONT>    /**<a name="line.56"></a>
<FONT color="green">057</FONT>     * This image observer blocks until the image is completely loaded. AWT<a name="line.57"></a>
<FONT color="green">058</FONT>     * defers the loading of images until they are painted on a graphic.<a name="line.58"></a>
<FONT color="green">059</FONT>     *<a name="line.59"></a>
<FONT color="green">060</FONT>     * While printing reports it is not very nice, not to know whether a image<a name="line.60"></a>
<FONT color="green">061</FONT>     * was completely loaded, so this observer forces the loading of the image<a name="line.61"></a>
<FONT color="green">062</FONT>     * until a final state (either ALLBITS, ABORT or ERROR) is reached.<a name="line.62"></a>
<FONT color="green">063</FONT>     *<a name="line.63"></a>
<FONT color="green">064</FONT>     * @author Thomas Morgner<a name="line.64"></a>
<FONT color="green">065</FONT>     */<a name="line.65"></a>
<FONT color="green">066</FONT>    public class WaitingImageObserver implements ImageObserver, Serializable,<a name="line.66"></a>
<FONT color="green">067</FONT>                                                 Cloneable<a name="line.67"></a>
<FONT color="green">068</FONT>    {<a name="line.68"></a>
<FONT color="green">069</FONT>      /** For serialization. */<a name="line.69"></a>
<FONT color="green">070</FONT>      static final long serialVersionUID = -807204410581383550L;<a name="line.70"></a>
<FONT color="green">071</FONT>    <a name="line.71"></a>
<FONT color="green">072</FONT>      /** The lock. */<a name="line.72"></a>
<FONT color="green">073</FONT>      private boolean lock;<a name="line.73"></a>
<FONT color="green">074</FONT>    <a name="line.74"></a>
<FONT color="green">075</FONT>      /** The image. */<a name="line.75"></a>
<FONT color="green">076</FONT>      private Image image;<a name="line.76"></a>
<FONT color="green">077</FONT>    <a name="line.77"></a>
<FONT color="green">078</FONT>      /** A flag that signals an error. */<a name="line.78"></a>
<FONT color="green">079</FONT>      private boolean error;<a name="line.79"></a>
<FONT color="green">080</FONT>    <a name="line.80"></a>
<FONT color="green">081</FONT>      /**<a name="line.81"></a>
<FONT color="green">082</FONT>       * Creates a new &lt;code&gt;ImageObserver&lt;code&gt; for the given &lt;code&gt;Image&lt;code&gt;.<a name="line.82"></a>
<FONT color="green">083</FONT>       * The observer has to be started by an external thread.<a name="line.83"></a>
<FONT color="green">084</FONT>       *<a name="line.84"></a>
<FONT color="green">085</FONT>       * @param image  the image to observe (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.85"></a>
<FONT color="green">086</FONT>       */<a name="line.86"></a>
<FONT color="green">087</FONT>      public WaitingImageObserver(final Image image) {<a name="line.87"></a>
<FONT color="green">088</FONT>        if (image == null) {<a name="line.88"></a>
<FONT color="green">089</FONT>          throw new NullPointerException();<a name="line.89"></a>
<FONT color="green">090</FONT>        }<a name="line.90"></a>
<FONT color="green">091</FONT>        this.image = image;<a name="line.91"></a>
<FONT color="green">092</FONT>        this.lock = true;<a name="line.92"></a>
<FONT color="green">093</FONT>      }<a name="line.93"></a>
<FONT color="green">094</FONT>    <a name="line.94"></a>
<FONT color="green">095</FONT>      /**<a name="line.95"></a>
<FONT color="green">096</FONT>       * Callback function used by AWT to inform that more data is available. The<a name="line.96"></a>
<FONT color="green">097</FONT>       * observer waits until either all data is loaded or AWT signals that the<a name="line.97"></a>
<FONT color="green">098</FONT>       * image cannot be loaded.<a name="line.98"></a>
<FONT color="green">099</FONT>       *<a name="line.99"></a>
<FONT color="green">100</FONT>       * @param     img   the image being observed.<a name="line.100"></a>
<FONT color="green">101</FONT>       * @param     infoflags   the bitwise inclusive OR of the following<a name="line.101"></a>
<FONT color="green">102</FONT>       *               flags:  &lt;code&gt;WIDTH&lt;/code&gt;, &lt;code&gt;HEIGHT&lt;/code&gt;,<a name="line.102"></a>
<FONT color="green">103</FONT>       *               &lt;code&gt;PROPERTIES&lt;/code&gt;, &lt;code&gt;SOMEBITS&lt;/code&gt;,<a name="line.103"></a>
<FONT color="green">104</FONT>       *               &lt;code&gt;FRAMEBITS&lt;/code&gt;, &lt;code&gt;ALLBITS&lt;/code&gt;,<a name="line.104"></a>
<FONT color="green">105</FONT>       *               &lt;code&gt;ERROR&lt;/code&gt;, &lt;code&gt;ABORT&lt;/code&gt;.<a name="line.105"></a>
<FONT color="green">106</FONT>       * @param     x   the &lt;i&gt;x&lt;/i&gt; coordinate.<a name="line.106"></a>
<FONT color="green">107</FONT>       * @param     y   the &lt;i&gt;y&lt;/i&gt; coordinate.<a name="line.107"></a>
<FONT color="green">108</FONT>       * @param     width    the width.<a name="line.108"></a>
<FONT color="green">109</FONT>       * @param     height   the height.<a name="line.109"></a>
<FONT color="green">110</FONT>       *<a name="line.110"></a>
<FONT color="green">111</FONT>       * @return    &lt;code&gt;false&lt;/code&gt; if the infoflags indicate that the<a name="line.111"></a>
<FONT color="green">112</FONT>       *            image is completely loaded; &lt;code&gt;true&lt;/code&gt; otherwise.<a name="line.112"></a>
<FONT color="green">113</FONT>       */<a name="line.113"></a>
<FONT color="green">114</FONT>      public synchronized boolean imageUpdate(<a name="line.114"></a>
<FONT color="green">115</FONT>          final Image img,<a name="line.115"></a>
<FONT color="green">116</FONT>          final int infoflags,<a name="line.116"></a>
<FONT color="green">117</FONT>          final int x,<a name="line.117"></a>
<FONT color="green">118</FONT>          final int y,<a name="line.118"></a>
<FONT color="green">119</FONT>          final int width,<a name="line.119"></a>
<FONT color="green">120</FONT>          final int height) {<a name="line.120"></a>
<FONT color="green">121</FONT>        if ((infoflags &amp; ImageObserver.ALLBITS) == ImageObserver.ALLBITS) {<a name="line.121"></a>
<FONT color="green">122</FONT>            this.lock = false;<a name="line.122"></a>
<FONT color="green">123</FONT>            this.error = false;<a name="line.123"></a>
<FONT color="green">124</FONT>            notifyAll();<a name="line.124"></a>
<FONT color="green">125</FONT>            return false;<a name="line.125"></a>
<FONT color="green">126</FONT>        }<a name="line.126"></a>
<FONT color="green">127</FONT>        else if ((infoflags &amp; ImageObserver.ABORT) == ImageObserver.ABORT<a name="line.127"></a>
<FONT color="green">128</FONT>            || (infoflags &amp; ImageObserver.ERROR) == ImageObserver.ERROR) {<a name="line.128"></a>
<FONT color="green">129</FONT>            this.lock = false;<a name="line.129"></a>
<FONT color="green">130</FONT>            this.error = true;<a name="line.130"></a>
<FONT color="green">131</FONT>            notifyAll();<a name="line.131"></a>
<FONT color="green">132</FONT>            return false;<a name="line.132"></a>
<FONT color="green">133</FONT>        }<a name="line.133"></a>
<FONT color="green">134</FONT>        //notifyAll();<a name="line.134"></a>
<FONT color="green">135</FONT>        return true;<a name="line.135"></a>
<FONT color="green">136</FONT>      }<a name="line.136"></a>
<FONT color="green">137</FONT>    <a name="line.137"></a>
<FONT color="green">138</FONT>      /**<a name="line.138"></a>
<FONT color="green">139</FONT>       * The workerthread. Simply draws the image to a BufferedImage's<a name="line.139"></a>
<FONT color="green">140</FONT>       * Graphics-Object and waits for the AWT to load the image.<a name="line.140"></a>
<FONT color="green">141</FONT>       */<a name="line.141"></a>
<FONT color="green">142</FONT>      public synchronized void waitImageLoaded() {<a name="line.142"></a>
<FONT color="green">143</FONT>    <a name="line.143"></a>
<FONT color="green">144</FONT>        if (this.lock == false)<a name="line.144"></a>
<FONT color="green">145</FONT>        {<a name="line.145"></a>
<FONT color="green">146</FONT>          return;<a name="line.146"></a>
<FONT color="green">147</FONT>        }<a name="line.147"></a>
<FONT color="green">148</FONT>    <a name="line.148"></a>
<FONT color="green">149</FONT>        final BufferedImage img = new BufferedImage(<a name="line.149"></a>
<FONT color="green">150</FONT>            1, 1, BufferedImage.TYPE_INT_RGB<a name="line.150"></a>
<FONT color="green">151</FONT>        );<a name="line.151"></a>
<FONT color="green">152</FONT>        final Graphics g = img.getGraphics();<a name="line.152"></a>
<FONT color="green">153</FONT>    <a name="line.153"></a>
<FONT color="green">154</FONT>        while (this.lock) {<a name="line.154"></a>
<FONT color="green">155</FONT>          if (g.drawImage(this.image, 0, 0, img.getWidth(this),<a name="line.155"></a>
<FONT color="green">156</FONT>                img.getHeight(this), this)) {<a name="line.156"></a>
<FONT color="green">157</FONT>            return;<a name="line.157"></a>
<FONT color="green">158</FONT>          }<a name="line.158"></a>
<FONT color="green">159</FONT>    <a name="line.159"></a>
<FONT color="green">160</FONT>          try {<a name="line.160"></a>
<FONT color="green">161</FONT>            wait(500);<a name="line.161"></a>
<FONT color="green">162</FONT>          }<a name="line.162"></a>
<FONT color="green">163</FONT>          catch (InterruptedException e) {<a name="line.163"></a>
<FONT color="green">164</FONT>            Log.info(<a name="line.164"></a>
<FONT color="green">165</FONT>              "WaitingImageObserver.waitImageLoaded(): InterruptedException thrown",<a name="line.165"></a>
<FONT color="green">166</FONT>              e<a name="line.166"></a>
<FONT color="green">167</FONT>            );<a name="line.167"></a>
<FONT color="green">168</FONT>          }<a name="line.168"></a>
<FONT color="green">169</FONT>        }<a name="line.169"></a>
<FONT color="green">170</FONT>      }<a name="line.170"></a>
<FONT color="green">171</FONT>    <a name="line.171"></a>
<FONT color="green">172</FONT>      /**<a name="line.172"></a>
<FONT color="green">173</FONT>       * Clones this WaitingImageObserver.<a name="line.173"></a>
<FONT color="green">174</FONT>       *<a name="line.174"></a>
<FONT color="green">175</FONT>       * @return a clone.<a name="line.175"></a>
<FONT color="green">176</FONT>       *<a name="line.176"></a>
<FONT color="green">177</FONT>       * @throws CloneNotSupportedException this should never happen.<a name="line.177"></a>
<FONT color="green">178</FONT>       * @deprecated cloning may lock down the observer<a name="line.178"></a>
<FONT color="green">179</FONT>       */<a name="line.179"></a>
<FONT color="green">180</FONT>      public Object clone() throws CloneNotSupportedException {<a name="line.180"></a>
<FONT color="green">181</FONT>        return (WaitingImageObserver) super.clone();<a name="line.181"></a>
<FONT color="green">182</FONT>      }<a name="line.182"></a>
<FONT color="green">183</FONT>    <a name="line.183"></a>
<FONT color="green">184</FONT>      /**<a name="line.184"></a>
<FONT color="green">185</FONT>       * Returns &lt;code&gt;true&lt;/code&gt; if loading is complete, and &lt;code&gt;false&lt;/code&gt;<a name="line.185"></a>
<FONT color="green">186</FONT>       * otherwise.<a name="line.186"></a>
<FONT color="green">187</FONT>       *<a name="line.187"></a>
<FONT color="green">188</FONT>       * @return A boolean.<a name="line.188"></a>
<FONT color="green">189</FONT>       */<a name="line.189"></a>
<FONT color="green">190</FONT>      public boolean isLoadingComplete() {<a name="line.190"></a>
<FONT color="green">191</FONT>        return this.lock == false;<a name="line.191"></a>
<FONT color="green">192</FONT>      }<a name="line.192"></a>
<FONT color="green">193</FONT>    <a name="line.193"></a>
<FONT color="green">194</FONT>      /**<a name="line.194"></a>
<FONT color="green">195</FONT>       * Returns true if there is an error condition, and false otherwise.<a name="line.195"></a>
<FONT color="green">196</FONT>       *<a name="line.196"></a>
<FONT color="green">197</FONT>       * @return A boolean.<a name="line.197"></a>
<FONT color="green">198</FONT>       */<a name="line.198"></a>
<FONT color="green">199</FONT>      public boolean isError() {<a name="line.199"></a>
<FONT color="green">200</FONT>        return this.error;<a name="line.200"></a>
<FONT color="green">201</FONT>      }<a name="line.201"></a>
<FONT color="green">202</FONT>    }<a name="line.202"></a>




























































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